A Sigma 85mm f/1.4 DG HSM Art is badly needed given the modest optical performance of the Nikon 85mm f/1.4G at f/1.4, but that is not the issue in question here.

The real issue is precision (tightly clustered consistency) since with AF Fine Focus Adjust, a highly precise performance, even if off slightly, can be adjusted so that the results are highly accurate in a tight grouping (minimal shot-to-shot variance, precise). Put another way, a tight cluster (precision) not in the bullseye (inaccurate) can be remain a tight cluster and be recentered to hit the bullseye (precision + accuracy).